The hexagonal symmetry of the snowflake is one of nature's wonders. The repeating molecular structure of ice classifies it as a Mineral. Billions of identical water molecules collect together in a cloud to form a single snowflake. Each molecule is comprised of just three atoms -- two Hydrogen and one Oxygen, H2O. Self-organization enables these simple ingredients to combine into intricate and endlessly variable designs.
Photographs courtesy of Professor Kenneth Libbrecht at the California Institute of Technology